On Mon, Nov 27, 2023 at 02:21:01PM +0800, Yu Kuai wrote: > From: Yu Kuai <[email protected]> > > block_devcie is allocated from bdev_alloc() by bdev_alloc_inode(), and > currently block_device contains a pointer that point to the address of > inode, while such inode is allocated together:
This is going the wrong way. Nothing outside of core block layer code should ever directly use the bdev inode. We've been rather sloppy and added a lot of direct reference to it, but they really need to go away and be replaced with well defined high level operation on struct block_device. Once that is done we can remove the bd_inode pointer, but replacing it with something that pokes even more deeply into bdev internals is a bad idea.
